First, how do you know it's a high-PR page? (There's no such thing as a "high-PR site." PR is assigned at the page level.) Google stopped updating the public (toolbar) PR number years ago. While they still use PR internally as a ranking factor, no one outside the Googleplex knows what the current PR is for any given page.
Second, is this a link you are going to "build" yourself? (That is, are you able to place a live link yourself?)
Or is it an editorial link? (That is, a link that somebody else
places on their site because they like your offer or your content -- or at the very least a link that you submit but which undergoes an editorial review and approval process before going live?)
In general, editorial links are far more valuable than "built" links. In general, it's better to get a link from a reputable site than not to get such a link. Any editorial link can potentially help. How much it will help is an open question (and one which no one can answer for sure).